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R/C Tech Forums Thread Wiki: Official Team Associated RC10 B5m Mid-Motor Thread
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Old 07-23-2015, 06:15 PM   #14701
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Try switching the rear hubs.

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Old 07-23-2015, 06:33 PM   #14702
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That looks like what I have here. I'm so confused. Haha.
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Old 07-23-2015, 06:36 PM   #14703
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Look closer!!! Swap the hubs left to right, right to left
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Old 07-23-2015, 07:12 PM   #14704
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That looks like what I have here. I'm so confused. Haha.
No...that's not at all what the last post showed - they are backwards.

Simply switch the hubs and you're good to go.
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Old 07-23-2015, 07:36 PM   #14705
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Figured it out. Sorry for the dumb questions. Thanks everyone for the help! I took the rear end apart no less than five times trying to switch things around and get it to work.
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Old 07-23-2015, 08:13 PM   #14706
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Figured it out. Sorry for the dumb questions. Thanks everyone for the help! I took the rear end apart no less than five times trying to switch things around and get it to work.
No worries, we've all done it - those who haven't are lying.
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Old 07-24-2015, 12:11 AM   #14707
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Built a new diff, all parts from the B5m lite manual, upgraded rings, mip thrust nut, avid ceramic thrust, usual stuff I build them with. For some reason I can't get it tight, when I spin the wheel it goes around 2 times. I took apart checked it, tightened so tight broke thrust bolt, took apart again, looked an manual, feel I am missing something. Put together re broke it on, still feels too free to me. Does not feel like all my other 3 gears, which spin 1 time and kind of come to an abrupt stop. Rebuilt a new diff for back up but usually when I tighten the thrust the outdrives get tight to where I have to back off a 1/4 or 1/2 again this one feels loose and can't tighten anymore.
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Old 07-24-2015, 04:57 AM   #14708
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Built a new diff, all parts from the B5m lite manual, upgraded rings, mip thrust nut, avid ceramic thrust, usual stuff I build them with. For some reason I can't get it tight, when I spin the wheel it goes around 2 times. I took apart checked it, tightened so tight broke thrust bolt, took apart again, looked an manual, feel I am missing something. Put together re broke it on, still feels too free to me. Does not feel like all my other 3 gears, which spin 1 time and kind of come to an abrupt stop. Rebuilt a new diff for back up but usually when I tighten the thrust the outdrives get tight to where I have to back off a 1/4 or 1/2 again this one feels loose and can't tighten anymore.
The avid thrust bearing is thinner than a normal thrust bearing. Don't know if that could be part of your issue or not. Since you said you usually use them
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Old 07-24-2015, 06:10 AM   #14709
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That looks like what I have here. I'm so confused. Haha.
The rear arms look backwards to.
On the lite kits, the "R" arm goes on the left and the "L" on the right side.
They are actually the regular B5R arms. Little confusing to say the least.

Swapping those will kick the hubs more forward away from the shocks. Check the RC car action pic Chris above.
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Old 07-24-2015, 06:18 AM   #14710
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The avid thrust bearing is thinner than a normal thrust bearing. Don't know if that could be part of your issue or not. Since you said you usually use them
I run the avid thrust in my stock diff and my pucks. I do not have this issue.
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Old 07-24-2015, 07:16 AM   #14711
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Originally Posted by Cridd View Post
Built a new diff, all parts from the B5m lite manual, upgraded rings, mip thrust nut, avid ceramic thrust, usual stuff I build them with. For some reason I can't get it tight, when I spin the wheel it goes around 2 times. I took apart checked it, tightened so tight broke thrust bolt, took apart again, looked an manual, feel I am missing something. Put together re broke it on, still feels too free to me. Does not feel like all my other 3 gears, which spin 1 time and kind of come to an abrupt stop. Rebuilt a new diff for back up but usually when I tighten the thrust the outdrives get tight to where I have to back off a 1/4 or 1/2 again this one feels loose and can't tighten anymore.

You can't always go by feel until the diff has been used a bit. Since you broke it in I'd put it in the car, check it under load, and give it a battery pack. Unless there's a part [or parts] that are poorly machined I don't see how the diff could not be right if its assembled correctly. I guess its possible that you didn't pre-collapse the spring in the diff with pliers or maybe you put the diff nut in backwards....but I doubt it. I know that you've built a few diffs.
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Old 07-24-2015, 08:03 AM   #14712
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Originally Posted by Cridd View Post
Built a new diff, all parts from the B5m lite manual, upgraded rings, mip thrust nut, avid ceramic thrust, usual stuff I build them with. For some reason I can't get it tight, when I spin the wheel it goes around 2 times. I took apart checked it, tightened so tight broke thrust bolt, took apart again, looked an manual, feel I am missing something. Put together re broke it on, still feels too free to me. Does not feel like all my other 3 gears, which spin 1 time and kind of come to an abrupt stop. Rebuilt a new diff for back up but usually when I tighten the thrust the outdrives get tight to where I have to back off a 1/4 or 1/2 again this one feels loose and can't tighten anymore.
Put one of the old thrust wahers on first then the avid. Avid is thinner and the screw runs out of thread.
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Old 07-24-2015, 08:10 AM   #14713
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Quote:
Originally Posted by Cridd View Post
Built a new diff, all parts from the B5m lite manual, upgraded rings, mip thrust nut, avid ceramic thrust, usual stuff I build them with. For some reason I can't get it tight, when I spin the wheel it goes around 2 times. I took apart checked it, tightened so tight broke thrust bolt, took apart again, looked an manual, feel I am missing something. Put together re broke it on, still feels too free to me. Does not feel like all my other 3 gears, which spin 1 time and kind of come to an abrupt stop. Rebuilt a new diff for back up but usually when I tighten the thrust the outdrives get tight to where I have to back off a 1/4 or 1/2 again this one feels loose and can't tighten anymore.
take 2 wrenches drop them in the slots of the outdrives. hold together in one hand. get a towel and grab the diff gear and try to slip it. if it slips tighten diff 1/8th turn. repeat above.
get it so it slips just slightly then tighten it. And then try slipping it with the towel again. If it doesnt slip its ready to go in the car.
Bear in mind you have to use alot of force with your hand to get the diff to slip. But I guarantee it will be close
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Old 07-24-2015, 08:43 AM   #14714
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Quote:
Originally Posted by Pinebox View Post
The rear arms look backwards to.
On the lite kits, the "R" arm goes on the left and the "L" on the right side.
They are actually the regular B5R arms. Little confusing to say the least.

Swapping those will kick the hubs more forward away from the shocks. Check the RC car action pic Chris above.
The arms are not on wrong. No matter what arms you use if they're on the wrong side, it moves the shock mount to the front of the arm. Which will be a VERY noticeable problem. If we really want to get picky the pic from RC Car Action is of a B5m, not a B5m lite. The location of the screw holding in the hinge pin tells you so.

It's all a moot point. He already said he figured it out.
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Old 07-24-2015, 09:00 AM   #14715
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Got the replacement hex and finished up the build. Gonna go run it today at OCRC.





RTR weight



and the fleet ready to go

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